One that is sadly overlooked is THE MAN FROM PLANET X (1951).It was directed by old horror and noir director Edgar J. Ulmer-the man behind the Lugosi/Karloff classic the BLACK CAT (1934) and the classic noir D.O.A. (1950).Much like the old monster movies-it's very atmospheric.And the alien is NOT the bad guy...he's captured and tortured by a scientist.